experimental: linux abstract domain sockets

perl5120delta has an entry for "Abstract namespace sockets."  They're a
Linux-ism with which I am only somewhat familiar.  They were added in
99f13d4c and have been only barely touched since then.

Are they used?  Do we want to be committed to fixing bugs if they're found?
When would we want to call this experiment concluded?

My initial feeling is that abstract namespace sockets are pretty simple in
implementation, and we're not committing to much to remove the experimental
label.  If they break, they get a bug report, and we'll merge a fix if we can.
There isn't a lot of crazy design to be worried about.

I will commit such a change unless there is a good argument against it.

-- 
rjbs

• experimental: linux abstract domain sockets by Ricardo Signes